package com.cjt.security;

import cn.hutool.json.JSONUtil;
import com.cjt.common.lang.R;
import com.cjt.utils.JwtUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.web.authentication.logout.LogoutSuccessHandler;
import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler;
import org.springframework.stereotype.Component;

import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

@Component
public class JwtLogoutSuccessHandler implements LogoutSuccessHandler {

    @Autowired
    JwtUtils jwtUtils;


    @Override
    public void onLogoutSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
        response.setContentType("application/json;charset=UTF-8");

        if (authentication != null) {
            new SecurityContextLogoutHandler().logout(request, response, authentication);;
        }
        ServletOutputStream servletOutputStream = response.getOutputStream();
        //生成JWT 并设置到请求头中
        response.setHeader(jwtUtils.getHeader(),"");

        R r = R.success("");
        servletOutputStream.write(JSONUtil.toJsonStr(r).getBytes(StandardCharsets.UTF_8));
        servletOutputStream.flush();
        servletOutputStream.close();
    }
}
